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Dołączył: 30 Sie 2010
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 Wysłany: Nie 2:07, 12 Gru 2010 Temat postu: ugg italia R eyepiece with a million workers were |
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R eyepiece with a million workers were measured from M Gear cross bar size
Normal line micrometer normal length measurement difficult, the amount of rod diameter process requirements d = 0.724, measured M size 13.078_ (1.-0.00418, grinding teeth is a combination of multiple pieces of processing, the more the amount of rods measured value M convenient and stable, the actual measured value of 13.061 M, the deviation is a 0.017 pass. but in the finished product testing for a single slice in diameter and small, difficult to measure the amount of stick control and measuring instability, it is difficult under Conclusion. present work was to switch million eyepiece measuring R, the choice of R is 0.2, objective lens 3 times, calculation and measurement of its cross-bar from the M value. measuring steps: (1) gear to be tested placed on the table plane,[link widoczny dla zalogowanych], First, by using coordinates of ocular alignment in Figure l, required to gear slots as the center,[link widoczny dla zalogowanych], left and right sides of its symmetrical profile and find a pair of symmetrical teeth suitable H leveled by the highest profile in a straight line, it is sufficient to find positive. Second, put R eyepiece, the direct use of 0.2R by two symmetric alveolar alignment. (2) using 3-fold objective, and 0.2R, 0.2R groove with teeth on both sides of the alveolar pressure and the measured line Under the reading phase Remember, mobile workstations, using the same method with another symmetric alveolar pressure line tangent to the tooth was another reading, the difference between the two readings is the center of the center distance of two 0.2R,[link widoczny dla zalogowanych], which is l0 ・ 2RM the measured value may 2RM actually 12.192. M real = 2RM real + d = 12.192 +0.667 = 12.859 (3) RM of the theoretical calculation was elected 3 times with the objective lens and eyepiece RO.2 , the conversion was 0.667 in diameter according to Table 1 for each of the parameter values into the following formula: .. d. 7fnVMlnva + a = inv20. + O.667 = 0.021668 investigation of a involute function table was: aM = 22. 33 aM values into the formula have the following:. a ZCOS ~ a Q (_3Q: a few M M A 2cos mouth of a 2 × ∞ s22. 33:6.10492 RM = 2 × 6.1049 = 12.210M reasons: 2RM + d = 12.210 +0.667:12.877 the measured value compared with the theoretical value of AM = M A M real reason = 12.859-12.877 = 0.018 with a 0.724 with a physical quantity measuring stick deviation is obtained for a 0.017 M shy of 0.001, was close. In order to further verify the measurement results are given by drawing a length of 4.301 of a common normal -00-- () 2.0006 (4 teeth), with the million workers were directly measure the actual length of WaX = 4.295, a 0.006 deviation Ews,[link widoczny dla zalogowanych], converted to the deviation of the deviation of RM in Figure 2 can be obtained: ARM = Ews =- 0. li 006 = A 0.0078: △ M = 2ARM = 2 (a 0.0078) = 0.016 by one of the three methods of measurement and conversion ratio on the measurement results of the difference of 0.002, which is present measurement measurement error and the reason for a slightly different position,[link widoczny dla zalogowanych], but in theory should be consistent., Jfinv% H / l \ ~ √ J \ 0f1 '/ .. Figure 1 Example 2: Measurement of internal gears, gear parameters m = 3 , a = 20., z = 25, to allow AM (+0.116 - +0.226). Figure 2 (1) eyepiece with the coordinates being measured as a rule one way to find gear shown in Figure 3, replace R eyepiece , R0.5 and 1 times the objective lens used, the conversion value is 5.00, first with the R0.5 and the line tangent to the pressure on both sides ol profile, write down the coordinates of the reading, move across the table to the location of o2 and o3 pressure line tangent from the difference between the two readings was o1D value, o2 and o3 tooth position for hours may not be a straight line, it is desirable average of two readings obtained o1D value. measured o】 D = 78.554. (2) calculation of RM, theoretical value for each of the generations following formula: .. ap7c2x ・ tananV. Mlnva A + + - a = inv20. a 5 + +: 0.03590725 ~ Figure 3 involute function table search was: oral M = 26 . 2745 RM-2 calculation: a 2 × cos26. 2745 = 39.3626 in actual measurement, the measured value is o1D, o1D value of the theoretical value: O1D: RM (1 + Cos): 39.3626 (1 + cOs) = 78.415 o1D with the measured value of 78.554 compared to standard. An example of the measurement and verification, we can see the gear with the R M value of the eyepiece measuring method is simple, economical and practical, and has a higher measurement accuracy, For small module gear and internal gear especially for the measurement, but also significantly expand the application of a million workers.
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